Picture from: https://www.flickr.com/photos/avlxyz/6151594631
Cons
Getting people to act - Raising awareness so that people buy less and use what they buy will be an extremely difficult task. Restaurants and Supermarkets might not like the idea of serving smaller portions or selling food that would've been thrown away previously. But hopefully with enough campaigns and more people starting to take action, everyone will realize that this is important and will change their habits.